4DWX

AcronymDefinition
4DWXFour Dimensional Weather System
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2008), a 30-member 4DWX ensemble, North American Mesoscale (NAM), and Global Forecast System (GFS) model outputs as well as satellite products.
Because 4DWX uses WRF as its predictive core, MATERHORN WRF modelers' experiences were similar to DPG's experiences with 4DWX, such as an underpredicted diurnal cycle, biases in the near-surface wind speed, and insufficiently stratified conditions in the shallow SBL.
WRF 4DWX could predict the overall flow patterns, including the flow distortion by GM, but as expected finer features such as vortex structures and in-canyon flows could not be captured (Fig.